Answer:
The correct answer is m= mol solute kg soivent
Explanation:
Molality is a measure of concentration, which indicates the moles of solute (in this case sodium hydroxide) in 1kg of solvent .
In this case:
0,800 kg water-----0,400 mol NaOH
1 ,000 kg water ---x=(1 ,000 kg water x 0,400 mol NaOH)/0,800 kg water
x=0,5 mol NaOH---> <em>The solution is 0,5 molal (0,5 m)</em>
The answer would be A) Salicylic.
There is not enough information for this to be answered
Answer:
0.03586
Explanation:
Given data
2M solution means 2 moles of Cacl2 in 1 L of solution.
mass of solution = 1000mL×1.17 g/mL= 1170g
mass of CaCl2= 2mole×111 g/mol =222g
mass of water= 1170-222=968g
moles of water= 968/18= 53.77 moles
mole fraction of CaCl2= 
mole fraction of CaCl2= 
=0.03586
His experiment was most likely designed to demonstrate the law of conservation of energy, which states that energy the total energy of an isolated system remains constant; it is said to be conserved over time. This law means that energy can neither be created nor destroyed; rather, it can only be transformed or transferred from one form to another. So, he was trying to demonstrate that the amount of heat energy released was equal to the number of calories (amount of energy) stated to be in the candy bar.
